Gambling

Gambling is a skill possessed by the MC, an activity you can pursue at a variety of establishments throughout the game world (Poker at The Dockgrave Tavern, Daiku at Shunsuke's, whilst Carousing at Divine Juices, and at your own Tavern if you build one), and also something which might crop up as a way of dealing with certain Quests (e.g. trying to win Adrienne from The Mad Preacher). The activity can be a good way of making a lot of money, once you have become good at it (i.e. achieved a high Skill level) - but you might have to lose a lot of money on your way to becoming adequately skilful to start making reliable gains.